Remote Control Module AC and DC Schematic Diagram
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Armstrong Oscillator
The Armstrong oscillator is utilized to generate a sine-wave output with a constant amplitude and fairly stable frequency within the RF range. It is commonly employed as a local oscillator in receivers, as a source in signal generators, and as...
50MHz crystal bug
This bugg is based on my previous 3-transistor transmitter. This bugg unit has many advantages. The transmitter uses a crystal 46.515MHz to hold a steady frequency. The frequency can be fine-tuned by some 100kHz. The transmitter can send data and...
100 MHz RF oscillator with ATtiny12
A frequency reference for tuning up the RS-232 to 100 MHz RF desktop channel adapter elsewhere on this site, when I found this Saronix crystal oscillator in my junk box. A few minutes with AVRStudio produced an ATtiny12 to make...
Receiver for 50 khz optical transmitter
To achieve maximum range, the receiver should be constructed similarly to a radio receiver front end, as the signals received will exhibit comparable frequency components and amplitudes of the photodiode current. The primary limitation on the receiver's performance is the...
Remote Control Mains Switch
Remote Control Mains Switch
The remote control mains switch is a device designed to control the power supply to electrical appliances from a distance, typically utilizing a wireless remote control. This switch can be integrated into various applications where remote operation...
How to Read a Schematic
Electronic circuits are presented in schematic form. A schematic is essentially a map that illustrates the path of current through various components. Each component is represented by a symbol, typically accompanied by a label or a value, or both. The...
Telegraph Transmitter in the Pilot Radios Radio Design magazine 1930s
The TPTG transmitter has been transformed into a modern TNT model. This transmitter can utilize the existing K-111 power pack for both the transmitter and receiver, eliminating the need for a separate power supply unit. Building this compact transmitter allows...
Transmitter Servicing Course
With the equipment ready for operation, the main line switch (S-831), the emergency switch (S-12), and the main line contactor contacts (K-831B) are all closed. The keying relay main contacts (K-1C) ground the center tap of the MO filament secondary...
remote
Each unit features four channels, enabling the programming and operation of up to four separate devices with a single remote, provided these devices operate on the same frequency. The unit can automatically learn from existing garage door remotes or built-in...